EP0423037B1 - Dispositif de commande asservie - Google Patents

Dispositif de commande asservie Download PDF

Info

Publication number
EP0423037B1
EP0423037B1 EP90402853A EP90402853A EP0423037B1 EP 0423037 B1 EP0423037 B1 EP 0423037B1 EP 90402853 A EP90402853 A EP 90402853A EP 90402853 A EP90402853 A EP 90402853A EP 0423037 B1 EP0423037 B1 EP 0423037B1
Authority
EP
European Patent Office
Prior art keywords
valve
clevis
input
rack
source
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90402853A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0423037A1 (fr
Inventor
Christian Laudinet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0423037A1 publication Critical patent/EP0423037A1/fr
Application granted granted Critical
Publication of EP0423037B1 publication Critical patent/EP0423037B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00—Control of position or direction
    • G05D3/12—Control of position or direction using feedback
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B9/00—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member
    • F15B9/02—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type
    • F15B9/08—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor
    • F15B9/12—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor in which both the controlling element and the servomotor control the same member influencing a fluid passage and are connected to that member by means of a differential gearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00—External control of clutches
    • F16D48/06—Control by electric or electronic means, e.g. of fluid pressure
    • F16D48/066—Control of fluid pressure, e.g. using an accumulator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/10—System to be controlled
    • F16D2500/102—Actuator
    • F16D2500/1021—Electrical type
    • F16D2500/1023—Electric motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/314—Signal inputs from the user
    • F16D2500/31406—Signal inputs from the user input from pedals
    • F16D2500/31413—Clutch pedal position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/314—Signal inputs from the user
    • F16D2500/3146—Signal inputs from the user input from levers
    • F16D2500/31466—Gear lever

Definitions

  • the present invention relates to a servo control device, such as for example and without limitation a device intended to servo the clutch control in a motor vehicle.
  • a certain number of vehicles are fitted with clutch control devices, either as standard by the manufacturer, or individually by the user or by a craftsman.
  • the servo-control in position and in effort of the control booster relative to a movable input member is not always as precise as it would be desirable. Often, it is only intended that the actuator be controlled all or nothing in at least one of the directions of operation.
  • the device designated as a whole by the reference 10 is intended in the illustrated embodiment to control a clutch mechanism 12 of a vehicle, not shown, arranged between a motor 11 and a gearbox 13.
  • This lever is intended to spread the plates of the clutch mechanism or to let them come together under the action of return springs as well known to those skilled in the art, and for this reason the plates and other elements are not shown.
  • An annex spring 22 recalls the pedal in position noted.
  • the servo control device comprises a servomotor 24, formed of a housing 26 divided into two chambers 28, 30, by a movable wall 32 forming a piston.
  • a servomotor 24 formed of a housing 26 divided into two chambers 28, 30, by a movable wall 32 forming a piston.
  • the seal between the two chambers is maintained throughout the travel of the movable wall by means of an annular unwinding membrane 34, fixed at its internal periphery to the mobile wall, and at its external periphery at housing.
  • the movable wall carries an outlet member 36, in the form of a rod passing through one of the chambers and the front wall 38 of the corresponding housing, with the interposition of a suitable seal 40.
  • the rod 36 is connected by a traction cable 42 to the lever 20 in order to drive the latter in the direction corresponding to the disengagement when the movable wall moves away from the wall 38 of the housing under the pressure difference prevailing in the chambers 28 , 30 of the housing as will be seen later.
  • the internal springs of the clutch mechanism cause the clutch and recall the movable wall 32 in approach to the wall 38 of the housing.
  • the chamber 28 located on the side of the rod has an orifice 44 and a connecting duct 46 to a source 48 of high pressure gas, formed here by the atmosphere.
  • the opposite chamber 30 has an orifice 50 and a connection duct 52 towards a valve 54 which makes it possible to selectively place the connection duct in communication with the same source of high pressure gas, or with a source of low pressure gas 56, for example a vacuum tank connected to the intake manifold 57 of a petrol engine 11, or a vacuum pump.
  • a source of low pressure gas 56 for example a vacuum tank connected to the intake manifold 57 of a petrol engine 11, or a vacuum pump.
  • the valve 54 illustrated by way of example comprises two twin valves 54a, 54b, each with two channels and two positions. The first controls the communication between the line 52, therefore the chamber 30, and the atmosphere or high pressure source 48, while the second controls the communication between the line 52 and the low pressure source 56.
  • Each valve comprises a pusher 58a, 58b which controls the valve and which is itself moved by an actuating device 62 as will be seen below.
  • the actuating device 62 comprises: - A movable input member 64, here in the form of a rotary shaft, driven in this embodiment by a pinion 66 meshing with a rack 68, itself driven back and forth longitudinally by a motor 70; it also includes a movable reaction member 72, in the form of a second rotary shaft driven by a pinion 74 meshing with a rack 76 defined on the output rod of the booster.
  • the two input shafts 64 and reaction 72 are arranged in alignment and terminate in conical pinions 78, 80 of reaction input respectively located face to face.
  • a yoke 82 swivels around the trees 64, 72; it carries a shaft 84, perpendicular to the input and reaction shafts, in free rotation and which ends in a differential bevel gear 86, which meshes with the two input and reaction bevel gears.
  • the yoke finally comprises two cam surfaces, 88a, 88b respectively, which are in contact with the two pushers 58a, 58b of the valves 54a, 54b.
  • the pushers are located side by side and directed perpendicular to the common axis of the shafts 64, 72 and the cam surfaces are defined on two sectors located side by side on the yoke 82 in the axial direction.
  • the two cam surfaces have radial contours illustrated in superposition in FIG. 2, one in solid lines, the other in dashes, generally symmetrical with respect to the radial plane containing the two plungers.
  • each surface comprises a large radius area 90a, 90b such that the pushers 58a, 58b are moved in the closed position of the valve covers, and a small radius area 92a, 92b such that the pushers are moved in position opening the valve covers.
  • the small and large radius areas 90a, 92a; 90b, 92b, of the two cams are connected by transition zones 94a, 94b.
  • the two surfaces are wedged angularly with respect to each other so that their two zones of large radius 90a, 90b meet by overlapping slightly just before the start of their respective transition zones 94a, 94b.
  • control unit 96 itself connected to a current source 98 on the one hand, and to a certain number of sensors 100 and / or detectors associated with various vehicle components.
  • This control unit 96 includes the electronic logic circuits necessary to control the starting of the drive motor 70, in one direction or the other according to predetermined criteria and sequences.
  • the various members shown occupy the positions illustrated in FIGS. 1 and 2.
  • the clutch pedal 14 is in the raised position corresponding to the engagement condition of the clutch mechanism 12, the piston 32 servomotor is pulled by the traction cable 42 and the rod 36 to a position close to the front wall 38 of the housing 26, the yoke 82 occupies an angular position such that the two large diameter zones 90a, 90b of its surfaces cam 88a, 88b are in contact with the valve pushers 58a, 58b 51, 54b, which keeps these in the closed position, the inlet rack 68 is retracted into a starting position and the motor 70 ' is not powered.
  • control unit 96 In response to a determined signal, for example a signal delivered by a sensor 100a associated with the operating lever 102 of the gearbox 13, the control unit 96 causes the power supply to the motor 70 for driving the rack which is moves in the direction indicated by the arrow F in FIG. 1. This movement causes the rotation of the input shaft 64 and its associated pinion 78, in the direction of arrow R in FIGS. 1 and 2.
  • a determined signal for example a signal delivered by a sensor 100a associated with the operating lever 102 of the gearbox 13
  • the servomotor piston 32 remains stationary, as do the outlet rod 36, the shaft 72 and the reaction pinion 80.
  • the ramp surfaces 88a, 88b move relative to the pushers 58a, 58b.
  • the first cam surface 88a remains in contact with the pusher 58a of the first valve 54a by its large radius area 90a, so that this valve remains closed and that the pipe 52 remains isolated from the atmosphere 48.
  • the rotation brings the transition zone 94b of the second cam surface opposite the pusher 58b which therefore moves in the opening direction of the valve 54b.
  • the pipe 52 is placed in communication with the vacuum source 56.
  • the resulting reduction in pressure in the chamber 30 of the booster generates the appearance of a force on the piston 32 which therefore moves away from the wall 38 of the housing in driving the traction cable 42 and the clutch lever 20 when the return forces of the springs mentioned above have been overcome.
  • the displacement of the output rod 36 is transmitted to the clutch lever which pivots causing the clutch mechanism to disengage.
  • the yoke 82 momentarily rotates in the opposite direction, so that the first cam surface 88a makes contact with the pusher 58a of the first valve at its transition zone 94a, which causes the opening of this valve 54a and setting the atmosphere 48 of the rear chamber 30 of the booster, while the second cam surface 88b keeps the second valve closed.
  • the force exerted on the piston 32 decreases and the springs of the clutch mechanism 12 remind the piston 32 in the direction of the front wall 38.
  • This displacement of the rod 36 produces a reverse rotation of the yoke 82 and the closing of the first valve 54a.
  • this return can take place in two phases: -
  • the control unit 96 will supply the drive motor 70 so as to cause the input rod 68 to perform, at a first predetermined speed, a first part of the return stroke corresponding to the return of the organs of the clutch mechanism 12 in licking condition, then after a predetermined period of time has elapsed, causing the input rod 68 to carry out the rest of its travel in a second phase to its rest position at one second predetermined speed, lower than the first.
  • speed sensors 100b, 100c of rotation will be provided on the input and output shafts of the clutch mechanism and the control unit will include a stage for comparing the signals delivered by these two sensors, which does not authorizes the triggering of the second phase only when the relative difference between the two speeds of rotation has fallen below a predetermined threshold before expiration of the predetermined period of time. If this relative deviation does not decrease below the threshold during this period of time, the control unit 96 supplies the motor 70 to move the input rod 68 by an incremental distance and again checks that the relative deviation speeds decrease below the threshold before the time expires.
  • the control unit 96 then stores the value of the new stroke back to the licking point, equal to the previous one, increased by as many increments as necessary.
  • the second re-clutch phase will be carried out at a speed controlled by the speed at which the engine speed, close to the gearbox ratio, reaches vehicle speed.
  • control unit can adapt the control unit according to the conditions specific to this vehicle.
  • the traction cable 42 can be attached to the pedal 14 instead of the operating lever 20 of the clutch device 12.
  • the reaction rack 76 can be defined not on the rod portion 36 located on the side of the traction cable 42, but on a rod extension located on the opposite side with respect to the piston and sealingly passing through the rear wall 26 of the housing.
  • the drive motor 70 can be of any suitable type, advantageously a stepping motor.
  • the mechanical connection between the drive motor 70 and the input rod 68 will be of the non-reversible type.
  • the drive motor 70 can directly drive the input shaft 64 by a gear motor.
  • it can be a brake motor.
  • the valve 54 may be of the three-way / three-position type comprising a single pusher.
  • the actuator 24 may be double-acting.
  • the two lines 46, 52 leading to the two chambers 28, 30 of the actuator will each be controlled by a valve assembly as described above, or even by a single 4-way / 3-position valve.
  • cam surfaces 88a, 88b can be formed directly on the yoke, by molding, machining, or other process, or even be formed on separate parts which are themselves attached to the yoke 82.
  • the yoke 82 carries a toothed wheel 110 fixed to the yoke and coaxial with the input shaft 64 but without connection with the latter.
  • This toothed wheel meshes with a rack 112, the two opposite ends of which bear against the pushers 58a, 58b of the two valves 54a, 54b.
  • the yoke 82 When the input shaft 64 rotates in the direction R, the yoke 82 initially rotates in the same direction by a half angle, driving the rack 112 in the direction R1 in the figure.
  • the rack 112 pushes the pusher 58b of the valve 54b, the cover 114e of which rises from its seat 116b, which puts the jack chamber under vacuum.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Servomotors (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Massaging Devices (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
EP90402853A 1989-10-12 1990-10-12 Dispositif de commande asservie Expired - Lifetime EP0423037B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8913362 1989-10-12
FR8913362A FR2653243B1 (enrdf_load_stackoverflow) 1989-10-12 1989-10-12

Publications (2)

Publication Number Publication Date
EP0423037A1 EP0423037A1 (fr) 1991-04-17
EP0423037B1 true EP0423037B1 (fr) 1994-12-21

Family

ID=9386338

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90402853A Expired - Lifetime EP0423037B1 (fr) 1989-10-12 1990-10-12 Dispositif de commande asservie

Country Status (4)

Country Link
EP (1) EP0423037B1 (enrdf_load_stackoverflow)
AT (1) ATE116065T1 (enrdf_load_stackoverflow)
DE (1) DE69015310D1 (enrdf_load_stackoverflow)
FR (1) FR2653243B1 (enrdf_load_stackoverflow)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB844396A (en) * 1957-05-17 1960-08-10 Rolls Royce Improvements relating to remote control apparatus
US3872773A (en) * 1972-08-09 1975-03-25 Nutron Corp Position controlling
JPS52151496A (en) * 1976-06-10 1977-12-15 Nisshin Sangyo Co Hydraulic servo mechanism
WO1986006445A1 (en) * 1985-04-30 1986-11-06 Hartmann + Lämmle Gmbh & Co Kg Device for adjusting the circuit amplification of a servo-regulating circuit
DE3721693A1 (de) * 1987-07-01 1989-01-19 Eumuco Ag Fuer Maschinenbau Elektrohydraulisches stellglied

Also Published As

Publication number Publication date
FR2653243A1 (enrdf_load_stackoverflow) 1991-04-19
ATE116065T1 (de) 1995-01-15
FR2653243B1 (enrdf_load_stackoverflow) 1992-02-07
EP0423037A1 (fr) 1991-04-17
DE69015310D1 (de) 1995-02-02

Similar Documents

Publication Publication Date Title
FR2634518A1 (fr) Dispositif de manoeuvre pour un element de commande notamment de papillon, d'un moteur a combustion interne
EP0449739B1 (fr) Dispositif de commande motorisé de changement de rapport de transmission pour boîte de vitesses, en particulier pour véhicules automobiles
FR2816554A1 (fr) Systeme de transmission de vehicule et dispositif de changement de vitesse pour cette transmission
FR2516194A1 (fr) Transmission a commande hydraulique pour vehicule automobile
FR2800820A1 (fr) Mecanisme de manoeuvre pour un dispositif d'embrayage
EP0490730B1 (fr) Dispositif de commande motorisé de changement de rapports de transmission pour boîte de vitesses, en particulier pour véhicules automobiles
FR2598126A1 (fr) Transmission pour les roues avant d'un vehicule a quatre roues motrices, en particulier d'un tracteur agricole
FR2464850A1 (fr) Dispositif de transmission automatique perfectionne pour vehicule a quatre roues motrices
EP0633411A1 (fr) Système de sélection assistée des rapports d'une boite de vitesses, notamment sur un véhicule automobile
EP0420736B1 (fr) Timonerie de transmission de forces pour véhicules automobiles
FR2678869A1 (fr) Vehicule utilitaire a quatre roues motrices.
FR2774447A1 (fr) Vehicule equipe d'un dispositif de manoeuvre automatisee d'une boite a vitesses
WO2014060663A1 (fr) Ensemble de transmission pour engin automoteur, du type positionnable entre l'arbre primaire moteur et les roues dudit engin
EP0420738B1 (fr) Timonerie de transmission de forces pour vehicules automobiles
EP0423037B1 (fr) Dispositif de commande asservie
EP1318335B1 (fr) Boíte de vitesses automatisée à passages sous couple
FR2519385A1 (fr) Ensemble a dispositifs de commande d'un moteur et de reaction
FR2598983A1 (fr) Systeme de regulation de la vitesse de croisiere pour vehicule automobile.
EP2199647B1 (fr) Boîte de vitesses manuelle avec passage en translation et sélection en rotation comportant un frein de marche arrière utilisant un synchroniseur de marche avant
FR2554769A1 (fr) Appareillage de manoeuvre et commande d'un groupe d'entrainement a variateur de vitesse pour vehicules automobiles
FR2797486A1 (fr) Boite de vitesses
FR2712540A1 (fr) Dispositif d'assistance au débrayage dans les véhicules automobiles.
FR2688747A1 (fr) Dispositif d'actionnement d'un systeme tel qu'un embrayage ou une boite de vitesse.
FR2552568A1 (fr) Dispositif de commande de deplacement et de direction d'un vehicule a entrainement hydraulique et a direction par derapage
FR2621669A1 (fr) Mecanisme de changement de vitesse pour vehicule automobile

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES GB IT LI LU NL

17P Request for examination filed

Effective date: 19910913

17Q First examination report despatched

Effective date: 19931227

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES GB IT LI LU NL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19941221

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19941221

Ref country code: GB

Effective date: 19941221

Ref country code: AT

Effective date: 19941221

Ref country code: NL

Effective date: 19941221

REF Corresponds to:

Ref document number: 116065

Country of ref document: AT

Date of ref document: 19950115

Kind code of ref document: T

REF Corresponds to:

Ref document number: 69015310

Country of ref document: DE

Date of ref document: 19950202

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19950322

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 19941221

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19951031

Ref country code: BE

Effective date: 19951031

Ref country code: CH

Effective date: 19951031

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19951031

26N No opposition filed
BERE Be: lapsed

Owner name: LAUDINET CHRISTIAN

Effective date: 19951031

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL